well since social media can affect attention spans negatively, as I've observed with myself recently, I don't think the effects of such would translate positively into social or educational circumstances, arguably the most needed situations in a child's life at that time, even if they are almost an adult.
sure, alcohol and drugs do still affect a child quite intensely, though I'm saying that, is social media and the endless dopamine harvesting NOT a drug? if you think about it, it extracts, makes a person want to come back for more, causing addiction, further extracting more, losing its effectiveness and making it almost impossible to quit from there.
people may say it isn't addictive, but its just that it isn't as noticeable since it is a society-wide phenomena which is seen as positive.